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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a0f186a4984246e77fc13d8ad3ce31207e5244d11e190b9ed068b00e4438fdf' 
  AND token = 'Eda1UtZ33aLlCN+yU7tyTXVrWId6Gtn8/HTZmPhUxyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}